This course, API Design and Fundamentals of Google Cloud's Apigee API Platform, is the first in a series of three courses in the Developing APIs for Google Cloud's Apigee API Platform specialization. This course introduces you to API design and the fundamentals of the Apigee platform. The second course focuses on API security. The third course focuses on additional API development topics. In this course, you learn how to design APIs, and how to use OpenAPI specifications to document them. You learn about the API lifecycle, and how the Apigee API platform helps you manage all aspects of the lifecycle. You learn about how APIs can be designed using API proxies, and how APIs are packaged as products to be used by app developers. This course utilizes hands-on labs that model an API development process that can be used for real-world projects on Google Cloud's Apigee API platform.